how to change spring default mvc error error code 400 of “The request sent by the client was syntactically incorrect”

Question

Java Spring MVC

When sending invalid requests (broken JSON for example) to the controller endpoint, the response is:

HTTP status 400: "The request sent by the client was syntactically incorrect" this is returned without actually entering the controller action.

since my endpoint is open for 3rd parties I want to override this error code (only this kind of error - not all error codes from the endpoint) and modify it.

Overriding the message is optional but would be a nice addition.

** Explain for the duplicate mark: I know how to set the error code once the request lands in the controller action, the issue i am describing is that the request does not enter the action method since the syntax is incorrect.

Answer 1

I think this kind of error message is MethodArgumentNotValidException.class . you can use an controller adviser and change returned error code :

@ControllerAdvice
public class MyErrorHandler {

    @ExceptionHandler(MethodArgumentNotValidException.class)
    @ResponseStatus(HttpStatus.OK /*or your optional error code */ )
    @ResponseBody
    public JPresent myHandler(MethodArgumentNotValidException ex) {
  //   handle error
}

Answer 2

add this code in you web.xml file

<error-page>
     <error-code>400</error-code>
     <location>/WEB-INF/views/errorPages/page-error-400.jsp</location>
</error-page>

you can do the same thing for the rest of error code you want to handle